Pump.



N03 818,001. PATENTED APR. 17; 1906.

E! W, sTRQUP,

PUMP

APPLICATION FILED AUG. l1i 1904.

EMERY W. STROUP, OF ROLLERSVILLE, OHIO.

PUMP.

Specification of Letters Patent.

Patented April 17, 1906.

Appli a ion fi August 11, 1904. Serial No. 20,

To all whom, it may concern.-

Be it known that I, EMERY WV. SrRoUP, a citizen of the United States, residing at Rollersville, in the county of Sandusky and State of Ohio, have invented a new and useful Pump, of which the following is a specification.

This invention relates particularly to improvements in pumping mechanism employed in oil or oil-and-water wells, though undoubtedly useful in other types, more especially where the wells are of comparatively great depth.

In oil and oil-and-water Wells after the fluid has been pumped from the well the operation of the plunger draws gas into the space between the working and standing valves. The pressure of fluid above the piston holds the valve thereof down, so that the gas in this space cannot escape, while the pressure of this gas against the standing valve preventsits working also.

The object of the present invention is to provide simple means of a novel nature whereby the pump can be vented, thus allowing the escape of gas and effecting the priming of said pump.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein- Figure 1 is avertical sectional view through the working barrel of a pump, showing the improved mechanism applied to said pump. Fig. 2 is a longitudinal sectional view, on an enlarged scale, through the piston. Fig. 3 is a horizontal sectional view through the valvecage thereof, and Fig. 4 is a sectional view on the line 4 4 of Fig. 2.

Similar reference-numerals indicate corresponding parts in all the figures of the drawings.

In the embodiment illustrated the pumpbarrel 5 is of the usual tubular formation and can be constructed in any manner desired. In its lower end is located a standing valve member comprising a body 6, having an upstanding valve-cage 7, within which is located an upwardlyopening ball-valve 8. These parts are also well known to the art and need no further description.

The piston or plunger of the pump consists of a tubular body 9, carrying the usual packing-rings 10 and having in its upper end a valve-seat 11. A ball-valve cooperates With the seat 1 1, being adapted to rest thereupon and being vertically movable from the same. This ball-valve 12 is inclosed by a valve-cage 13, threaded upon the upper end of the body and having a connection with the sucker or piston rod 14. A strainer-cage 15 in the form of a cup has its upper end internally threaded and screwed upon the lower end of the body 9, said cage having openings 16 in its annular walls and being, furthermore, provided with a thickened bottom forming a boss 17. Means for moving the valve 12 with respect to its seat is employed in the form of a stem 18, that extends longitudinally through the body 9, so that its upper end is adapted to strike the ball-valve 12 when the stemis projected through the seat 11. This stem 18 extends through the strainer-cage and is slidable in an opening 19, formed in the bottom 17 thereof. Said stem is carried by the cage 15, and for this purpose retaining means in the form of collars 20 are secured to the stem on opposite sides of the bottom, said collars permitting the limited sliding movement of the stem.

In the ordinary operation of the pump the piston or plunger is reciprocated in the usual manner; but its path of downward movement is limited, so that the lower end of the stem will not engage the cage 7 of the standing valve. The valves 8 and 12 consequently operate in the ordinary manner, alternately closing and opening, and thereby effecting the elevation of the fluid through the barrel. If, however, the well has been pumped dry and gas has collected therein, so that the valves will not operate properly, or if the pump needs priming from any cause, it is only necessary to lower the piston so that the lower end of the stem 18 will strike the top of the standing valve member, whereupon the valve 12 will be unseated, as shown in Fig, 2, the gas will readily escape, and the liquid above the valve 12 will pass down into the working barrel of the pump, so that the valves will again become operative.

It will be apparent from an inspection of the drawings that the means for accomplishing these desirable ends is very simple and that the priming of the pump can be easily effected. In view of the fact that the stem is carried by the strainer-casing it is only necessary to remove the latter in order to detach the former, and it will also be clear that the improvement may be readily applied to an ordinary piston.

From the foregoing it is thought that the construction, operation, and many advan- ICC tages of the herein-described invention will be apparent without further description, and it will be understood that various changes in the size, shape, proportion, and minor de tails of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pump of the class described, the combination with a reciprocatory piston having a strainer provided with a bottom, said bottom having a guide-opening, of a valve movably mounted in the piston, a stem slidably mounted in the guide-opening and depending below the bottom ofwthe strainer, said stem when elevated in the piston being arranged to raise the valve, and means located in the path of movement of the lower end of the stem for effecting the movement of the same with respect to the piston and thereby raise the valve.

2. In a pump of the class described, the combination with a piston including a movable valve and a strainer-cage fixed upon and held against relative movement with respect thereto, of a stem slidably passing through the strainer-cage and depending below the same, and a standing valve disposed in the path of movement of the stem.

3. In a pump of the class described, the combination with a reciprocatory piston including a movable valve and a strainer-cage, of a stem slidably passing through the strainer-cage and carried thereby, said stem being adapted to engage the valve, and means for efiecting the movement of the stem.

4. In a pump of the class described, the combination with a piston including a body having a valve-seat and a valve movable toward and from the seat, a strainer-cage connected to the lower end of the body, and a stem slidably secured to the cage and extending longitudinally of the body, said stem being arranged to engage the valve to unseat the same.

5. In a pump of the class described, the combination with a piston comprising a tubular body having a valve-cage and seat at its upper end, of a valve located in the cage and movable toward and from the seat, a strainer-cage secured to the lower end of the body, a stem extending longitudinally through the body and arranged to engage the valve for the purpose of unseating the same, said stem also projecting through the lower end of the strainer-cage, and retain ing devices carried by the stem and located on opposite sides of the bottom of said strainer-cage.

6. In a pump of the class described, the combination with a pum -barrel, of a reciprocatory piston located t erein and comprising a tubular body, a valve-cage and seat located at the upper end of the body and a strainer-cage mounted on the lower end of the body, a valve located in the valve-cage and movable toward and from the seat, a stem extending longitudinally through the body and slidably carried by the strainercage, said stem being adapted to engage the valve to unseat the same, and a standing valve member secured within the barrel and having an upwardly-extending cage that is located in the path of movement of the lower end of the stem.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in the presence of two witnesses.

EMERY W. STROUP. Witnesses:

H. V. MEEKER, H. S. HATHAWAY. 

